Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ded3f65b628d21f…

MALICIOUS

PDF

84.4 KB Created: 2021-08-27 19:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f3a77bf48d3e4a85bc910a5df254db36 SHA-1: 0d583ab19315b0bad403ceea7103617a30ef3341 SHA-256: 2ded3f65b628d21f6088aca1bbe81ec24393cd218d0c6c6307dabd09c6b354ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the final destination. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this is a phishing or malware distribution lure. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://puntolinea.org/userfiles/files/remikexikazotaxevog.pdf In PDF document text
    • http://koyomisushi.com/uploads/files/mubetujap.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f45206f60---pimevur.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/51744142924.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/26690669679.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/fapenavizimarodokeku.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35b81df248---95289803098.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611a786b6ba19---68037976592.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/43006834313.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4e105be6f9374b9d8f48cf602d9ff855/51005174419.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/nofataladuro.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/87244098571.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/i79ra7teg3mdpp0b4lip9a2dvc/zisudijifokivitu.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/48800175057.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/16018409018.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/mikuvadajebeba.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/71728913085.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/0lfefjopsp7pth9cvq3jekpst6/56495934935.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/bajufe.pdfIn PDF document text
    • http://maihome.hu/admin1/file/sedurulajanebigunededoju.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/34905048327.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/kopotofupobubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=toy+story+4+happy+mealPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2275798cd56810d06b779603ce27c052/86579876811.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 10476 bytes
SHA-256: 45b0835509f3f8f4fc2c0ed3e4aab3688eaf2af0ebcf8f9ab1d50348db385ffe
font_02_sfnt_off000113d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D8 18604 bytes
SHA-256: c9850db762ec7138f5c24d1521ca1a3e314055787a2a1ef118983425aaf479ac